There are though, some complements that would be desirable to be an exception to that rule, but then again, it would be interesting to know when a clothing from another mod uses the same slot.
Finally, the slots used by different armors could be useful for other modders. So, I would ask you to comment which non-vanilla body slots use different mods not included in this list, despite them being clothing, armor, or whatever. I know there is already a consensus, but also know that there may be exceptions. This is not about what should be used, but what is being used currently:
Here is the list I have so far:
44: scarves [scarves of Skyrim]
45: scarves [winter is coming] and wraps
46: cloaks [winter is coming, cloaks of skyrim]
47: backpacks
48: bandoliers (back left)
52: bandoliers (left side)
53: bandoliers (chest)
55: bandoliers (back right), lanterns (back), angelic halos and demonic horns
56: blindfold (right eye and both eyes), goggles, cloaks [cloak of the lace for lady]
57: bandoliers (front right), lanterns (front), blindfolds (left eye)
58: bandoliers (front left)
59: bandoliers (right side)
60: left hand rings
I added the name of the mod between '[' ']' signs, when different mods use different slots for the same item type and ‘(‘ ‘)’ signs to point where in the body the item model goes, when a mod adds an item type in various body slots. Besides slots not included, it would be helpful to know if any of the added ones is outdated or simply wrong.